<template>
  <div id="app">
    <ul>
      <li v-for="item in list" :key="item">{{ item }}</li>
    </ul>
    <button @click="fn">走一走</button>
  </div>
</template>

<script>
export default {
  name: 'App',
  data () {
    return {
      list: ['帅哥', '美女', '程序猿']
    }
  },
  methods: {
    fn () {
    const res =  this.list.splice(0,1).join('')
    this.list.push(res)
    }
  }
}
</script>

<style scoped>
body {
  background-color: #ccc;
}

#app {
  width: 400px;
  margin: 20px auto;
  background-color: #fff;
  border: 4px solid blueviolet;
  border-radius: 1em;
  box-shadow: 3px 3px 3px rgba(0, 0, 0, 0.5);
  padding: 1em 2em 2em;
}

#app h3 {
  text-align: center;
}

.title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid #ccc;
  padding: 0 1em;
}

.title h4 {
  line-height: 2;
  margin: 0;
}

.container {
  border: 1px solid #ccc;
  padding: 0 1em;
}

.btn {
  /* 鼠标改成手的形状 */
  cursor: pointer;
}
</style>
